US20210170312A1 - Filter device - Google Patents
Filter device Download PDFInfo
- Publication number
- US20210170312A1 US20210170312A1 US16/769,296 US201816769296A US2021170312A1 US 20210170312 A1 US20210170312 A1 US 20210170312A1 US 201816769296 A US201816769296 A US 201816769296A US 2021170312 A1 US2021170312 A1 US 2021170312A1
- Authority
- US
- United States
- Prior art keywords
- backwash
- filter
- drive shaft
- fluid
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 239000000706 filtrate Substances 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
- B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/08—Regeneration of the filter
- B01D2201/081—Regeneration of the filter using nozzles or suction devices
- B01D2201/082—Suction devices placed on the cake side of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/668—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
Definitions
- the invention relates to a filter device comprising a filter housing having a fluid inlet for unfiltered matter and having a fluid outlet for filtrate and having at least one multi-part or one-piece filter insert held in the filter housing, which filter insert can be cleaned using a backwash device having at least one backwash element in counter flow to the direction of filtration, which backwash device can be moved by means of a fluid-conveying drive shaft of a rotary drive along the inside of the relevant filter insert, wherein the individual backwash element has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft and which opens into a flow chamber connected to the drive shaft in a fluid-conveying manner.
- Filter devices of this type are state of the art, see for instance DE202011000268U. Cleaning filter inserts by backwashing results in the option of longer operating times between changing the filter inserts in these filter devices. This reduces maintenance costs and prevents frequent interruptions of operation.
- the filter units can be operated in automatic mode such that a backwash process is initiated if, due to dirt accumulating on the filter, the differential pressure ⁇ p reaches a preselected limit value at which cleaning is required. If such filter devices are used for applications in which there may be temporary dirt surges, for instance in maritime applications, such as ballast water applications, where extreme dirt concentrations in the inflow may occur, e.g. due to sediment turbulence in port basins, the known filter devices are inadequate.
- the invention addresses the problem of providing a filter device of the type mentioned above, which guarantees a high operational reliability for applications in which extreme dirt surges are to be expected.
- this object is achieved by a filter device having the features of claim 1 in its entirety.
- an essential feature of the invention is at least one further backwash device having at least one further backwash element being present, the fluid-conveying drive shaft being divided into chambers separated from each other and the one backwash element of the one backwash device being connected to one of the chambers and the other backwash element of the other backwash device being connected to another chamber. Because at least one additional backwash device is provided for each individual filter insert, the backwash efficiency of the filter device according to the invention can be flexibly adapted to the requirements for different dirt concentrations in the filter inlet. Activating the second backwash device accelerates the dirt discharge by 100% compared to the known operation having one backwash device per filter insert, i.e. even extreme dirt surges (TSS peaks) can be controlled.
- TSS peaks extreme dirt surges
- the filter device according to the invention can be operated in such that in normal operation, by opening only one of the chambers via a flushing valve, only one backwash device is operated for one backwash period as long as the increase Op over time at the filter is within a preselected limit value. If the increase in differential pressure accelerates, this one backwash unit is put into continuous operation. If a dirt surge occurs in this operating condition, the second backwash device is switched on by opening the backwash valve of the second chamber until the differential pressure drops to the desired value, after which the second backwash device is switched off again. The continuous flushing using the first backwash device is preferably maintained for a preselected time until the condition has returned to normal load. In this way, the invention permits a more efficient use of the screen area for high TSS mass flows. For smaller filter sizes, higher TSS peaks can be reliably controlled in this way.
- the backwash devices used are arranged diametrically opposite from each other in relation to the axis of rotation of the drive shaft.
- More than two back-backwash elements can be used, which are subdivided into groups and assigned to the one and to the further backwash device.
- a group of at least two backwash elements arranged vertically one above the other in parallel to the axis of rotation of the drive shaft can form a backwash device.
- the arrangement can advantageously be made such that the drive shaft is divided into two chambers along its axis of rotation, wherein the backwash elements of one backwash device open into one chamber and the backwash elements of the other backwash device open into the other chamber.
- the drive shaft can have passage openings on its opposite end faces for the discharge of backwash fluid of the one or the other backwash device.
- two vertically superimposed filter inserts are provided, each of which has two backwash devices, wherein in both filter inserts the backwash elements of one backwash device open into one chamber and the backwash elements of the other backwash device open into another chamber.
- the drive shaft is divided transversely to the axis of rotation into two further chambers, wherein the backwash elements of one backwash device in each filter insert are connected to one passage opening via one assigned chamber each and the backwash elements of the other backwash device are connected to the other passage opening via one further chamber each. Therefore, when both backwash devices of both filter inserts are in operation, the backwash quantities of two axially offset backwash devices flow out of each passage opening of the drive shaft. This results in a compensation of the flow forces acting on the drive shaft and in a reduction of mechanical stress.
- the discharge of backwash fluid via the passage openings of the drive shaft can be controlled by means of flushing valves, which can be actuated in a known manner by the assigned filter control system.
- the backwash elements are guided along the inside of the individual assignable filter insert without gap.
- the subject matter of the invention is also a process for operating a filter device according to any one of the claims 1 to 11 .
- FIG. 1 shows a perspective oblique view of an exemplary embodiment of the filter device according to the invention
- FIG. 2 shows a vertical section of the exemplary embodiment of the filter device, wherein the section plane has been moved out of the drawing plane in certain areas;
- FIG. 3 shows a central vertical section of an exemplary embodiment of the filter device
- FIG. 4 shows a perspective oblique view, wherein the exemplary embodiment is shown vertically cut away in a central sectional plane;
- FIG. 5 shows a perspective oblique view of the separately shown drive shaft for a second exemplary embodiment of the filter device according to the invention, wherein the outer wall areas are shown transparently to illustrate the design.
- FIGS. 1 to 4 which illustrate an exemplary embodiment of the filter device according to the invention as a whole, a filter housing as a whole is designated by 1 .
- the two-part filter housing 1 has a circular cylindrical inlet part 3 having a closed base 5 .
- a fluid inlet 8 is provided on its sidewall for the inflow of unfiltered matter into the inlet part 3
- a fluid outlet 9 for filtrate is located on the sidewall of the main part 7 . As shown in FIG.
- a switch box 11 is mounted on the outside of the main part 7 , which contains, among other things, a state-of-the-art electronic filter control system.
- the main part 7 is closed by a cover part 13 .
- a lower filter insert 15 and an upper filter insert 17 are held in the main part 7 , the filter sieves 19 and 21 of which are flowed through from the inside to the outside during the filtration process.
- the flow of unfiltered matter to the interior of the filter inserts 15 , 17 occurs from the inlet section 3 via a pre-filter 23 , which is intended for maritime use as a so-called fish screen.
- each filter insert 15 , 17 has a first backwash device 25 and a second backwash device 27 , which are each mounted diametrically opposite from each other on a drive shaft 29 , which is formed by a hollow shaft, which has a rectangular cross-section in the section extending through the filter inserts 15 , 17 .
- the backwash devices 25 and 27 of the filter inserts 15 , 17 each have two backwash elements 31 , which are arranged in pairs one above the other and each pair is supported on a joint support 33 as shown in FIG. 2 .
- An adjusting device 35 ( FIG.
- the adjusting devices 35 having a spindle drive may be designed in the manner as disclosed, for instance, in FIGS. 1 to 3 of an application DE102017002646.7, which shows a post-published state of the art, such that the adjusting device 35 provides for a radially outer end position for the supports 33 , from which they can be moved radially inwards against a spring force.
- the lower end of the drive shaft 29 is supported in a pivot bearing 37 , which is held on cross members 39 , which extend in the radial direction at the transition from the input part 3 to the main part 7 .
- the interior of the hollow drive shaft 29 having a passage opening 41 merges into a flushing line 43 , which is routed through the bottom 5 of the input part 3 to a flushing valve 45 , which can be actuated by an electric servomotor 47 .
- the upper end of the drive shaft 29 is supported in a pivot bearing 49 located on the cover part 13 , wherein a drive shaft extension 51 of the drive shaft 29 extends through the pivot bearing 49 into an attachment 53 located on the cover part 13 .
- the interior of the attachment 53 is connected to a second flushing valve 57 , which can be actuated by an electric servomotor 59 , via a second flushing line 55 .
- the drive shaft extension 51 of the drive shaft 29 is designed in the manner of a hollow pin as shown in FIG. 5 using the example of the drive shaft 29 provided for a second exemplary embodiment.
- the drive shaft extension 51 has an upper passage opening 61 as an outlet from the interior of the drive shaft 29 , as well as lateral, window-like wall openings 63 for the fluid connection to the interior of the attachment 53 and thus to the flushing line 55 .
- a coupling slot 65 is formed in the shaft 51 , with which a driver 67 of the output shaft 69 of an electric gear motor 71 engages, which is arranged on the top of the attachment 53 .
- the drive shaft 29 is divided by a partition wall 73 , which extends along the axis of rotation over a large part of the length of the drive shaft 29 between the passage openings 41 and 61 , into two chambers 75 and 77 , of which the chamber 75 is connected to the lower passage opening 41 and the other chamber 77 is connected to the upper passage opening 61 .
- the flow channels some of which are numbered and denoted by 79 in FIG. 4 only, of the pair of backwash elements 31 on the left side of the drawing are connected to the chamber 75 , whereas the backwash elements 31 of the pairs on the right side are connected to the other chamber 77 .
- the filter device according to the invention can therefore be operated such that under normal operating conditions, in which the increase of the pressure difference Op at the filter over time remains moderate, only one of the backwash devices 25 or 27 is put into operation in order to compensate for the increase of the pressure difference. If necessary, one of the backwash devices 25 or 27 remains in continuous operation. If an extreme dirt concentration in the inlet, for instance due to the occurrence of a TSS peak, occurs, the second backwash device 25 or 27 of the filter inserts 15 , 17 is switched on by opening the relevant further flushing valve 45 or 57 . If the differential pressure drops back to the normal value during backwash using both flushing devices 25 and 27 , then one backwash device 25 or 27 is switched off again, while continuous flushing using only one backwash device 25 or 27 can be maintained for a preselected time.
- FIG. 5 shows the design of the drive shaft 29 of a second exemplary embodiment of the filter device according to the invention.
- the interior of the drive shaft 29 is divided into two additional chambers 85 and 87 by two further partitions 81 and 83 extending at an angle to the axis of rotation, of which the chamber 85 is connected to the upper passage opening 61 and the other chamber 87 is connected to the lower passage opening 41 .
- the flow channels 79 connect the backwash devices 25 of both filter inserts 15 and 17 to the lower passage opening 41 , in the design of FIG.
Abstract
Description
- The invention relates to a filter device comprising a filter housing having a fluid inlet for unfiltered matter and having a fluid outlet for filtrate and having at least one multi-part or one-piece filter insert held in the filter housing, which filter insert can be cleaned using a backwash device having at least one backwash element in counter flow to the direction of filtration, which backwash device can be moved by means of a fluid-conveying drive shaft of a rotary drive along the inside of the relevant filter insert, wherein the individual backwash element has, at the end adjacent to this inside, at least one gap-shaped passage opening, which extends in parallel to the axis of rotation of the drive shaft and which opens into a flow chamber connected to the drive shaft in a fluid-conveying manner.
- Filter devices of this type are state of the art, see for instance DE202011000268U. Cleaning filter inserts by backwashing results in the option of longer operating times between changing the filter inserts in these filter devices. This reduces maintenance costs and prevents frequent interruptions of operation. In combination with intelligent filter control systems, the filter units can be operated in automatic mode such that a backwash process is initiated if, due to dirt accumulating on the filter, the differential pressure Δp reaches a preselected limit value at which cleaning is required. If such filter devices are used for applications in which there may be temporary dirt surges, for instance in maritime applications, such as ballast water applications, where extreme dirt concentrations in the inflow may occur, e.g. due to sediment turbulence in port basins, the known filter devices are inadequate. For reasons of economy and because of the installation sizes required, it is not practical to design the filter device for the worst-case scenario of such applications, i.e. for extreme dirt surges, so-called TSS peaks (totally suspended solids). In terms of process stability and availability of equipment of the known filter devices there is room for improvement.
- In view of this issue, the invention addresses the problem of providing a filter device of the type mentioned above, which guarantees a high operational reliability for applications in which extreme dirt surges are to be expected.
- According to the invention, this object is achieved by a filter device having the features of claim 1 in its entirety.
- According to the characterizing part of claim 1, an essential feature of the invention is at least one further backwash device having at least one further backwash element being present, the fluid-conveying drive shaft being divided into chambers separated from each other and the one backwash element of the one backwash device being connected to one of the chambers and the other backwash element of the other backwash device being connected to another chamber. Because at least one additional backwash device is provided for each individual filter insert, the backwash efficiency of the filter device according to the invention can be flexibly adapted to the requirements for different dirt concentrations in the filter inlet. Activating the second backwash device accelerates the dirt discharge by 100% compared to the known operation having one backwash device per filter insert, i.e. even extreme dirt surges (TSS peaks) can be controlled.
- Advantageously, the filter device according to the invention can be operated in such that in normal operation, by opening only one of the chambers via a flushing valve, only one backwash device is operated for one backwash period as long as the increase Op over time at the filter is within a preselected limit value. If the increase in differential pressure accelerates, this one backwash unit is put into continuous operation. If a dirt surge occurs in this operating condition, the second backwash device is switched on by opening the backwash valve of the second chamber until the differential pressure drops to the desired value, after which the second backwash device is switched off again. The continuous flushing using the first backwash device is preferably maintained for a preselected time until the condition has returned to normal load. In this way, the invention permits a more efficient use of the screen area for high TSS mass flows. For smaller filter sizes, higher TSS peaks can be reliably controlled in this way.
- Advantageously the backwash devices used are arranged diametrically opposite from each other in relation to the axis of rotation of the drive shaft.
- More than two back-backwash elements can be used, which are subdivided into groups and assigned to the one and to the further backwash device. A group of at least two backwash elements arranged vertically one above the other in parallel to the axis of rotation of the drive shaft can form a backwash device.
- The arrangement can advantageously be made such that the drive shaft is divided into two chambers along its axis of rotation, wherein the backwash elements of one backwash device open into one chamber and the backwash elements of the other backwash device open into the other chamber.
- For the connection of the chambers to their assigned backwash valves, the drive shaft can have passage openings on its opposite end faces for the discharge of backwash fluid of the one or the other backwash device.
- In advantageous exemplary embodiments, two vertically superimposed filter inserts are provided, each of which has two backwash devices, wherein in both filter inserts the backwash elements of one backwash device open into one chamber and the backwash elements of the other backwash device open into another chamber.
- In the case of particularly advantageous exemplary embodiments, in the case of two filter inserts situated one above the other, the drive shaft is divided transversely to the axis of rotation into two further chambers, wherein the backwash elements of one backwash device in each filter insert are connected to one passage opening via one assigned chamber each and the backwash elements of the other backwash device are connected to the other passage opening via one further chamber each. Therefore, when both backwash devices of both filter inserts are in operation, the backwash quantities of two axially offset backwash devices flow out of each passage opening of the drive shaft. This results in a compensation of the flow forces acting on the drive shaft and in a reduction of mechanical stress.
- The discharge of backwash fluid via the passage openings of the drive shaft can be controlled by means of flushing valves, which can be actuated in a known manner by the assigned filter control system.
- There is a coupling point for the engagement of a drive motor on one of the end faces of the drive shaft, preferably on its upper end face in the vertical installation direction.
- With particular advantage, the backwash elements are guided along the inside of the individual assignable filter insert without gap.
- According to claim 12, the subject matter of the invention is also a process for operating a filter device according to any one of the claims 1 to 11.
- Below the invention is explained in detail with reference to exemplary embodiments shown in the drawing.
- In the Figures:
-
FIG. 1 shows a perspective oblique view of an exemplary embodiment of the filter device according to the invention; -
FIG. 2 shows a vertical section of the exemplary embodiment of the filter device, wherein the section plane has been moved out of the drawing plane in certain areas; -
FIG. 3 shows a central vertical section of an exemplary embodiment of the filter device; -
FIG. 4 shows a perspective oblique view, wherein the exemplary embodiment is shown vertically cut away in a central sectional plane; and -
FIG. 5 shows a perspective oblique view of the separately shown drive shaft for a second exemplary embodiment of the filter device according to the invention, wherein the outer wall areas are shown transparently to illustrate the design. - In
FIGS. 1 to 4 , which illustrate an exemplary embodiment of the filter device according to the invention as a whole, a filter housing as a whole is designated by 1. The two-part filter housing 1 has a circularcylindrical inlet part 3 having a closedbase 5. On theinlet part 3 there is amain housing part 7, which is circular-cylindrical in shape like theinlet part 3. Afluid inlet 8 is provided on its sidewall for the inflow of unfiltered matter into theinlet part 3, and afluid outlet 9 for filtrate is located on the sidewall of themain part 7. As shown inFIG. 1 , aswitch box 11 is mounted on the outside of themain part 7, which contains, among other things, a state-of-the-art electronic filter control system. At the top themain part 7 is closed by acover part 13. A lower filter insert 15 and anupper filter insert 17 are held in themain part 7, thefilter sieves filter inserts inlet section 3 via a pre-filter 23, which is intended for maritime use as a so-called fish screen. - For cleaning deposits on the
filter screen upper filter inserts first backwash device 25 and asecond backwash device 27, which are each mounted diametrically opposite from each other on adrive shaft 29, which is formed by a hollow shaft, which has a rectangular cross-section in the section extending through thefilter inserts FIGS. 3 and 4 , thebackwash devices filter inserts backwash elements 31, which are arranged in pairs one above the other and each pair is supported on ajoint support 33 as shown inFIG. 2 . An adjusting device 35 (FIG. 2 ) can be used to adjust the position of thesupports 33 relative to thedrive shaft 29 such that the outside of thebackwash elements 31, on which outside there is a backwash inlet slot as per usual, is guided along the inside of therelevant filter screen drive shaft 29. The adjustingdevices 35 having a spindle drive may be designed in the manner as disclosed, for instance, inFIGS. 1 to 3 of an application DE102017002646.7, which shows a post-published state of the art, such that the adjustingdevice 35 provides for a radially outer end position for thesupports 33, from which they can be moved radially inwards against a spring force. - The lower end of the
drive shaft 29 is supported in a pivot bearing 37, which is held oncross members 39, which extend in the radial direction at the transition from theinput part 3 to themain part 7. At the pivot bearing 37, the interior of thehollow drive shaft 29 having a passage opening 41 merges into aflushing line 43, which is routed through thebottom 5 of theinput part 3 to a flushingvalve 45, which can be actuated by anelectric servomotor 47. The upper end of thedrive shaft 29 is supported in a pivot bearing 49 located on thecover part 13, wherein adrive shaft extension 51 of thedrive shaft 29 extends through the pivot bearing 49 into anattachment 53 located on thecover part 13. The interior of theattachment 53 is connected to asecond flushing valve 57, which can be actuated by anelectric servomotor 59, via asecond flushing line 55. Thedrive shaft extension 51 of thedrive shaft 29 is designed in the manner of a hollow pin as shown inFIG. 5 using the example of thedrive shaft 29 provided for a second exemplary embodiment. As shown, thedrive shaft extension 51 has an upper passage opening 61 as an outlet from the interior of thedrive shaft 29, as well as lateral, window-like wall openings 63 for the fluid connection to the interior of theattachment 53 and thus to theflushing line 55. In addition, acoupling slot 65 is formed in theshaft 51, with which adriver 67 of theoutput shaft 69 of anelectric gear motor 71 engages, which is arranged on the top of theattachment 53. - As
FIGS. 3 and 4 show, in the first exemplary embodiment, thedrive shaft 29 is divided by apartition wall 73, which extends along the axis of rotation over a large part of the length of thedrive shaft 29 between thepassage openings chambers chamber 75 is connected to the lower passage opening 41 and theother chamber 77 is connected to the upper passage opening 61. For each filter insert 15 and 17, the flow channels, some of which are numbered and denoted by 79 inFIG. 4 only, of the pair ofbackwash elements 31 on the left side of the drawing are connected to thechamber 75, whereas thebackwash elements 31 of the pairs on the right side are connected to theother chamber 77. When thebackwash valve 45 at thefirst flushing line 43, which is connected to thechamber 75 via the passage opening 41, is opened, a backwash process only occurs using thebackwash device 25 of thefilter inserts second flushing valve 57 is opened when thefirst flushing valve 45 is closed, the backwash process only occurs using thebackwash devices 27 on the right side of the drawing, which are connected to thesecond flushing valve 57 via thesecond chamber 77, theupper outlet 61 and thebackwash line 55. If bothflushing valves backwash devices filter inserts - The filter device according to the invention can therefore be operated such that under normal operating conditions, in which the increase of the pressure difference Op at the filter over time remains moderate, only one of the
backwash devices backwash devices second backwash device valve flushing devices backwash device backwash device -
FIG. 5 shows the design of thedrive shaft 29 of a second exemplary embodiment of the filter device according to the invention. As shown, the interior of thedrive shaft 29 is divided into twoadditional chambers further partitions chamber 85 is connected to theupper passage opening 61 and theother chamber 87 is connected to thelower passage opening 41. While in the first exemplary embodiment theflow channels 79 connect thebackwash devices 25 of both filter inserts 15 and 17 to thelower passage opening 41, in the design ofFIG. 5 only theflow channels 79 of thebackwash elements 31 of thelower filter insert 15 are connected to thepassage opening 41, while theflow channels 79 of thebackwash device 25 of theupper filter insert 17 are connected to theupper passage opening 61. Theflow channels 89 of thesecond backwash device 27 of theupper filter insert 17 are also connected to the latter, as in the first exemplary embodiment, whereas the fluid channels of thesecond backwash device 27 of thelower filter insert 15 are connected to thelower passage opening 41, as in the first exemplary embodiment. For this arrangement, when both backwashdevices drive shaft 29 at more evenly distributed points, in comparison to the first exemplary embodiment, such that thedrive shaft 29 is subject to less mechanical stress during operation.
Claims (12)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017011221.5A DE102017011221A1 (en) | 2017-12-05 | 2017-12-05 | filter means |
DE102017011221.5 | 2017-12-05 | ||
PCT/EP2018/081575 WO2019110279A1 (en) | 2017-12-05 | 2018-11-16 | Filter device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20210170312A1 true US20210170312A1 (en) | 2021-06-10 |
US11458424B2 US11458424B2 (en) | 2022-10-04 |
Family
ID=64362540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/769,296 Active 2038-12-16 US11458424B2 (en) | 2017-12-05 | 2018-11-16 | Filter device |
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US (1) | US11458424B2 (en) |
EP (1) | EP3694623B1 (en) |
JP (1) | JP7328964B2 (en) |
KR (1) | KR20200090249A (en) |
CN (1) | CN111565813B (en) |
DE (1) | DE102017011221A1 (en) |
WO (1) | WO2019110279A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20210283537A1 (en) * | 2020-03-10 | 2021-09-16 | Grenex Limited | Backwashing suction device for fabric filtration apparatus |
US11278826B2 (en) * | 2017-03-18 | 2022-03-22 | Hydac Process Technology Gmbh | Filter apparatus |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL300326A (en) * | 2020-08-03 | 2023-04-01 | Netafim Ltd | Filter arrangements |
CN112156524B (en) * | 2020-09-16 | 2022-03-25 | 山鹰华中纸业有限公司 | Papermaking white water filtering device and filtering process |
KR102524114B1 (en) * | 2022-12-14 | 2023-04-21 | 주식회사 월드이노텍 | Back washable Filter |
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DE2327532C3 (en) | 1973-05-30 | 1975-12-04 | Dr.-Ing. Erich Dinglinger Kg, 2800 Bremen | Liquid filter with automatic cleaning |
GB1485989A (en) * | 1975-05-23 | 1977-09-14 | Plenty Group Ltd | Filter with backflushing device |
DE3443752A1 (en) * | 1984-11-30 | 1986-06-05 | August G. Koch Maschinenfabrik, 2300 Kiel | Backwashable filter for liquids |
IT1235896B (en) * | 1989-11-24 | 1992-11-25 | Gel Srl | SELF-CLEANING FILTER FOR WATER SYSTEMS, EQUIPPED WITH A HYDRAULIC TURBINET FOR THE OPERATION OF CERTAIN CLEANING BRUSHES |
CN2464423Y (en) * | 2001-02-14 | 2001-12-12 | 王克涛 | Horizontal counter-washing water filter |
JP3755487B2 (en) * | 2002-06-21 | 2006-03-15 | コベルコ建機株式会社 | Oil filter for construction machinery |
DE202011000268U1 (en) * | 2011-02-04 | 2012-05-16 | Boll & Kirch Filterbau Gmbh | Backwash filter with rinsing device |
WO2015076524A1 (en) | 2013-11-21 | 2015-05-28 | 현대중공업 주식회사 | Filter device |
CN203663533U (en) * | 2013-12-13 | 2014-06-25 | 欧阳良斌 | Self-cleaning screen filter for agricultural micro-irrigation system |
DE202014104200U1 (en) * | 2014-06-11 | 2015-09-14 | Boll & Kirch Filterbau Gmbh | Backwash filter and filter insert for this |
KR101666105B1 (en) * | 2015-03-11 | 2016-10-17 | 주식회사 파나시아 | Ballast water filtering device with enhanced back flush function |
CN205391896U (en) | 2016-03-04 | 2016-07-27 | 上海滤威过滤系统有限公司 | Filter and binary channels belt cleaning device thereof |
CN105536331B (en) * | 2016-03-04 | 2017-11-03 | 上海滤威过滤系统有限公司 | Filter and its binary channels cleaning device |
CN106582089A (en) * | 2016-11-24 | 2017-04-26 | 洛阳双瑞金属复合材料有限公司 | Hydraulic driven automatic self-cleaning filter |
DE102017002646A1 (en) | 2017-03-18 | 2018-09-20 | Hydac Process Technology Gmbh | filter means |
-
2017
- 2017-12-05 DE DE102017011221.5A patent/DE102017011221A1/en active Pending
-
2018
- 2018-11-16 US US16/769,296 patent/US11458424B2/en active Active
- 2018-11-16 CN CN201880078727.8A patent/CN111565813B/en active Active
- 2018-11-16 KR KR1020207018976A patent/KR20200090249A/en not_active Application Discontinuation
- 2018-11-16 WO PCT/EP2018/081575 patent/WO2019110279A1/en unknown
- 2018-11-16 JP JP2020531142A patent/JP7328964B2/en active Active
- 2018-11-16 EP EP18804594.2A patent/EP3694623B1/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11278826B2 (en) * | 2017-03-18 | 2022-03-22 | Hydac Process Technology Gmbh | Filter apparatus |
US20210283537A1 (en) * | 2020-03-10 | 2021-09-16 | Grenex Limited | Backwashing suction device for fabric filtration apparatus |
US11504655B2 (en) * | 2020-03-10 | 2022-11-22 | Grenex Limited | Backwashing suction device for fabric filtration apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE102017011221A1 (en) | 2019-06-06 |
EP3694623A1 (en) | 2020-08-19 |
JP2021505372A (en) | 2021-02-18 |
CN111565813A (en) | 2020-08-21 |
WO2019110279A1 (en) | 2019-06-13 |
CN111565813B (en) | 2022-06-14 |
EP3694623B1 (en) | 2024-01-10 |
JP7328964B2 (en) | 2023-08-17 |
KR20200090249A (en) | 2020-07-28 |
US11458424B2 (en) | 2022-10-04 |
EP3694623C0 (en) | 2024-01-10 |
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